Plaster-board.



No. 638,493. Patentad ".Dec. 5, |899.l

A. W. BLAZO &H. W. BELL.

PLAsTER BOARD. (Application ald may 25, m99.) (No Model.)

3 4 0 1` j P ,1. .1. L/ l. .w #.Wmwd.. 1 6 5 2 mWW/ 6 M i fm1... f 6, -Jf m 6 m u f fw 56. m a o a a H/ f .my o.. Q o a a a a m a a l 6 0 ...MM7l S m. f M W y llnrrnn Strains AUGUSTUS IV. BLAZO AND HARRY W. BELL, OFNEW YORK, N. Y.

PLASTIEK-BOARD.

SPECIFICATION forming part of Letters Patent No. 638,493, dated December5,1899.

Application led May 25, 1899 Serial No. 718,272. (No modell.)

` following is a specification.

This invention relates to plaster-boards; and the object of theinvention is to provide an'improved fireproof plaster-board soconstructed that the plaster will be prevented.

from separation therefrom, while at the saine time moisture will beprevented from penetrating through the board and its plaster.

A further object of the invention is to provide an improved plaster-backing and an improved furring-strip .adapted to be assembled onewith another and when assembled constituting an improved plaster-boardwhich when assembled with its companion boards will form an improvedbacking for the reception of plaster which will be maintained inposition thereon against separation therefrom, while the furring-stripswill form an air-space intermediate said backing and the adjacent wall,and thereby prevent the penetration of moisture through said board andplaster.

In the drawings accompanying and forming part of this specification,Figure lis a perspective view of a series of these improvedplaster-boards assembled in position adjacent to a wall with a V,part ofthe plaster broken away. Fig. 2 isa perspective view of thisimprovedplaster-board detached. Fig. 3 is a perspective View of one form offurring-strip detached from the board. Fig. 4t is a transverse sectionalview, on'an enlarged scale, taken in line u, d, Fig. 2. Fig. 5 is atransverse sectional view, on an enlarged scale, taken in line b b, Fig.2; and Fig 6 is a sectional view of one portion of the board, showinganother form of furring or stiffening strip secured thereto.

Similar characters of reference designate like parts in all the figuresof the drawings.

In iireproof construction it is now the practice to use in place oflathing plaster-boards formed of reproof material. In the use of theseplaster-boards, which are usually of relatively large area, it isessential that they be so constructed and placed in position that Toaccomplish one of the foregoing objects in an economical and durablemanner, We provide an improved plaster-board 2 of the desired size andmaterial', having a series of plaster-receiving apertures or openings 3.In the form shown these apertures or openings 3, which may be of anysize and shape adapted for the purpose, but shown herein as oblong, aredisposed in sections or rows 4', each row alternating with a solidsection 5 of said board, such solid sections facilitating the attachmentof the furring-strips, hereinafter described, and also constitutes ameans of permitting the fastening of the board in position, thefastening means usually extending through the solid sections and alsothe furring-strips, thereby constituting not only a means of securingthe plaster-,board in position, but also an additional means of securingthefurring-strips rigidlyin place. These apertures are shown havinginclined walls 6,

whereby the openings are of tapered formation, with the area thereof atone side of said board greater than the area thereof at the oppositeside. In the present instance the openings may taper from the rear tothe front face of said board, so that the area of the aperture at therear side of the board is greater than the area at the front sidethereof. By this formation not only can the boards be easily removedfrom the molds after they are formed, but the plaster when placed uponthe board will penetrate said openings and that portion thereof at therear side of the board, owing to the increased area of the openings,willbe prevented from pulling from the board, owing to the decreased area atthe front side of said openings,

IOO

the hardened plaster and the inclined walls of the openings acting asopposing wedges. Each of these boards is in practice provided withsuitable material, preferably of metal, and of some suitable shapeadapted for the purpose. In practice these furring-strips may be formedmore particularly as stiffening-strips, whereby only a small air-spacewill be formed iutermediate the plaster-board and the wall. In one formthereof, however, the furring-strips are so formed that not only will anair-space be formed intermediate the board and the wall, but alsointermediate the furring-strip and the plaster-board. In oneconstruction thereof this furring-strip is shown comprising alongitudinally-extending hollow projection or rib 9, having a pair oflateral wings or projections 10, provided with inturned edges l2, shownherein provided with teeth 13. These inturned edges are adapted topenetrate into the board while the same is in a plastic condition, sothat when the board becomes set the furring-strip will be rmly embeddedtherein. In another form thereof this furring-strip, (see Fig. 6,) whichin this case is more in the nature of a stiffening-strip 8, is merelyprovided with two bent edges lQ/,which may be of toothed formation ornot, as desired. These furring-strips are disposed in position while theboard is in a plastic condition in the mold, a strip being disposedalternately with each row of apertures, whereby it is embedded in asolid section of the board, so that when the board becomes set it can beremoved from the mold in a completed condi-i joint with each other,thefurring-strips engaging the wall and forming an air-space letintermediate the Wall and the j )laster-board to prevent the moisturefrom penetrating through the board. The boards may be secured inposition in any desired manner, as by nails or otherwise, which, ashereinbefore set forth, usually pass through the solid sections of saidboard, and thus through the furring-strips. The boards are thenplastered in the usual manner, whereupon the plaster entering throughthe openings or apertures clenches at the rear side of the board andeffectively prevents the separation of the plaster therefrom. Thispermanent anchoring or locking of the plaster to the board is alsomaterially assisted owing to the particular formation of the openings orapertures, whereby they are of greater area at the rear side than at thefront side of said board, so that the plaster which projects throughsaid apertures becomes set with inclined walls and being of greater areaat the rear side than at the front side of said board prevents theseparation of the plaster from the board in the manner hereinbefore setforth, and which will be readily understood without a furtherdescription thereof. It has been found in practice that the use of thefurring-strip also acts as a stiffening means to reinforce theboard,whereby it is of superior strength and durability.

Having described our invention, we claiml. A plaster-board having aseries of sections of plaster-receiving apertures or openings extendingtherethrough, each section of said openings alternating with a solidsection of said board thereby to facilitate the attachment offurring-strips and the board in position.

2. A plaster-board having a series of independent sections ofplaster-receiving apertures or openings therein, each of said sectionsalternating with a solid section of said board thereby to facilitate theattachment of furring-slrips and the board in position, and each of saidapertures or openings having inclined walls and having greater area atthe rear side of said board than at the front side thereof.

3. The herein-described plaster-board having a series 0f rows ofplaster-receiving apertures therein, each of said rows alternating witha solid section of said board, and each of said apertures havinginclined walls whereby it is of greater area at the rear side than atthe front side of said hoard; and a furring-strip embedded in saidplaster-board intermediate each pair of rows of apertures and comprisinga longitudinally-extending hollow rib and a pair of lateral wings orprojeetions provided with inturned edges having teeth.

4f. A plaster-board having a plurality of rows of plaster-receivingapertures therein, each row alternating with a solid section of saidboard, and each of said apertures having greater area at one side ofsaid board than at the other side thereof, and a furring-strip embeddedin each solid section intermediate each pair of rows of apertures andcomprising a member having a pair of edges adapted to enter said board.

5. A plaster-board having a plurality of rows of plaster-receivingapertures alternating with solid sections of said board, and afurring-strip disposed intermediate each pair of rows of said apertures.

6. A plaster-board having a series of plaster-receiving aperturestherein, and a plurality of furring-strips secured thereto.

7. A plaster-board having a series of plaster-receiving aperturestherein, and a plurality of furring-strips embedded in said plasterboardat the rear side thereof, said apertures being disposed in rows andalternating with said furring-strips.

S. A plaster-board having a metallic furring-strip embedded in one sidethereof.

9. A plaster-board having a furring-strip embedded in the rear sidethereof and comprising a metallic member having twolongitudinally-extending edges adapted to project into saidplaster-board.

10. A plaster-board having a furring-strip embedded therein andcomprising a member having its two edges provided with teeth adapted toproject into said board.

1l. A plaster-board having a furring-strip ICO IOS

embedded therein and comprising a member having a hollow rib providedwith a pair of edges adapted to extend into said board.

12. A plaster-board having` a' furring-strip comprising a member havinga hollow rib provided with tWo sets of teeth adapted to eX- tend intosaid board.

13. A plaster-backing comprisinga plurality of plaster-boards assembledto break joint With each other and each having a series ofplaster-receiving apertures therein and provided With a plurality offurring-strips embedded therein and adapted to engage a Wall to form anair-space intermediate said board and said Wall.

14. A plaster-backing Comprising a plurality of plaster-boards assembledto break joint With each other, each of said boards having a series ofplaster-receiving apertures therein disposed in rows, each rowalternating With a solid section of said board, and a plurality offurring-strips embedded in the solid sections of said board, oneintermediate each pair of rows at the rear side thereofand adapted toengage a Wall and thereby form an air-space intermediate said Wall andsaid board.

15. A plaster-backing comprising a series of plaster-boards assembled tobreak joint one with another, and each provided with a series ofapertures having inclined Walls, whereby eaeh is of greater area at therear side of said board than at the front side thereof, said aperturesbeing located in rows alternating With solid sections of said board; anda plurality of furring'strips embedded in the solid sections of saidboard at the rear side thereof, and each comprising a hollovvr ribhaving a pair of toothed projections and adapted to engage a Wall toform an air-space intermediate-said plaster-board, and each of saidfurring-strips also having an air-space intermediate said plaster boardand said strip.

16. A plastenboard having a furring-strip embedded in its rear side andprovided. with an air-space intermediate said strip and said board.

17. A plaster-board having a plurality of plaster-receiving aperturestherein, and a furring-strip secured thereto and constructed to form anair-space intermediate said strip and said board and an air-spaceintermediate said board and an adjacent Wall.

- AUGUSTUS W. BLAZO.

HARRY W. BELL. lVitnesses:

W. J. PURDY, FRED J. DOLE.

